The difference between someone like Kane and someone like Kassian, is that at least from reports, Kassian got along with teamates, but had trouble with controlling himself with substance abuse. He did break the law when he crashed his truck, but obviously that was under the influence.
Kane has documented issues with teammates, and as gotten into trouble with the law of his own accord, not necessarily under the influence of any substance. I happen to think he is an arrogant, entitled punk that has continued to get into trouble wherever he's been. Not to mention, he's been a bit of a band-aid the last few years. I, for one, want nothing to do with him, no matter how much talent he may have. The Jets had a decent team while he was there, with more than a few solid vets, but that didn't matter.
You want to move Eberle, and expect to get a problem back? Sure, but this is the type of problem that has toxic all over it. Get someone that is underperforming, but has some talent, without all the other baggage this clown brings.